.index1 {
    background-color: bisque;
    width: 1500px;
    height: 50px;
}

.index1 ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.left {
    position: absolute;
    top: 25px;
}

.right.a {
    float: right;
    position: absolute;
    top: 25px;
    left: 1000px;
    height: 50px;
}

.right.b {
    float: right;
    position: absolute;
    top: 25px;
    left: 1400px;
    height: 50px;
}